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\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\\
 & R1 & R2 & R3 & R4 \\\
VARIABLES & chg\_ln\_pop\_nw & chg\_ln\_pop\_nw & chg\_ln\_pop\_nw & chg\_ln\_pop\_nw \\\ \hline
 &  &  &  &  \\\
Standardized values of (dd) & 0.298*** &  &  & 0.238* \\\
 & (0.104) &  &  & (0.141) \\\
Standardized values of (shr\_tex) &  & 0.173** &  & -0.00273 \\\
 &  & (0.0810) &  & (0.0956) \\\
init\_pop &  &  & 26.52*** & 8.754 \\\
 &  &  & (7.668) & (12.33) \\\
Constant & -0.0827 & -0.0827 & -0.348** & -0.170 \\\
 & (0.0881) & (0.0951) & (0.155) & (0.154) \\\
 &  &  &  &  \\\
Observations & 48 & 48 & 48 & 48 \\\
 R-squared & 0.198 & 0.067 & 0.147 & 0.206 \\\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\\
\end{tabular}
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